TI-57’s 50 Steps.

[Gene]

I disagree that the 50 steps of the TI-57 are equal to the 100 of the SR-56.

Consider:

The SR-56 had 10 data memories, usable at all times.

The TI-57 started with 8, but (quote from rskey.org): "these are liberally used by many of the calculator's built-in functions. For instance, the t-register was mapped to register 7, precluding the simultaneous use of both; registers 6 and 5 were used for pending operations when evaluating complex expressions."

Plus, TI's merged steps on the 57 do not always add up to 100 unmerged either. Sure, if you have a lot of INV SUM R2 steps then yes, merged will help. One step vs. 3. But in most cases, average keystrokes per function are less than 2.

That plus the lower memory register availability sink the cheaper made TI-57 to me.

However :-) the TI-57 ** can ** be put into a Constant Memory mode. See it here:

http://rskey.org/gene/calcgene/57c.htm

My 2 cents! Worth that much.
Gene